I'd be more worried with one, because I would think that if one affected the other, the one being stuck outside and the other inside might make it more likely for them to get tangled? Maybe not. I am trying to picture the plumbing of testicles and my brain is blocking me for some reason. I mean generally they hang together, going up and down depending on how cold it gets. Torsion happens when a dog gets overly excited and jumps around like a maniac. It could happen with the stomach, the colon/intestines, or the testicles. Some people do tack the stomach to prevent bloat/torsion. I know someone who did that and the vet made a mistake and the intestine died and so did the dog. Very sad.
The point is, torsion is something that can happen with two testicles descended and possibly if they are undescended as well. But we don't remove the intestine, or the stomach because of that possibility, and it is just as deadly. We can remove the testicles and because it is just as well, as we wouldn't breed the dog anyway, there is no reason not to, after the dog is mature.
I'd wait for the dog to be two at least, and probably 3. Height is not the only thing. When you neuter a dog before he fills out, he doesn't fill out the same. He will generally not get the heavy mane, might have a bitchy -face, and I dunno, I just like the look of a dog.
Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.